Spreadsheet AI again

There are people who try to do anything and everything with a spreadsheet.  This was especially true 25 or 30 years ago. (I even designed an EXCEL spreadsheet version of Asa H light.)  I think it makes sense to create neural network programs in EXCEL.  There are a number of those available online and in texts. But I just recently ran across a Turing machine and a chatbot both programmed in EXCEL!